Kaspichania_Boats

using System;

class KaspichaniaBoats
{
    static void Main()
    {
        int N = int.Parse(Console.ReadLine());
        int width = (N * 2) + 1;
        int height = 6 + ((N - 3) / 2) * 3;
        int sailHeight = height * 2 / 3;
        int bottomHeight = height * 1 / 3;

        // print top(sail) part
        for (int i = 0; i < sailHeight; i++)
        {
            if (i == sailHeight - 1)
            {
                Console.Write(new string('*', width));
            }
            else
            {
                int starPos = i - 1;
                for (int j = N - 1; j >= 0; j--)
                {
                    if (starPos == j) Console.Write('*');
                    else Console.Write('.');
                }
                Console.Write('*');
                for (int j = 0; j < N; j++)
                {
                    if (starPos == j) Console.Write('*');
                    else Console.Write('.');
                }
            }
            Console.WriteLine();
        }

        // print bottom(base) part
        for (int i = 0; i < bottomHeight; i++)
        {
            if (i == bottomHeight - 1)
            {
                int dots = (width - N) / 2;
                Console.Write(new string('.', dots) +
                    new string('*', N) + new string('.', dots));
            }
            else
            {
                int starPos = i + 1;
                for (int j = 0; j < N; j++)
                {
                    if (starPos == j) Console.Write('*');
                    else Console.Write('.');
                }
                Console.Write('*');
                for (int j = N - 1; j >= 0; j--)
                {
                    if (starPos == j) Console.Write('*');
                    else Console.Write('.');
                }
            }
            Console.WriteLine();
        }
    }
}